package com.cfc.springcloud;

public class Test1 {


    public static void main(String[] args) {
        StringBuffer a = new StringBuffer("A");
        StringBuffer b = new StringBuffer("B");
        operate(a,b);
        System.out.println(a.toString()+","+b);
    }
    static void operate(StringBuffer x,StringBuffer y){
        y.append(x);
        y=x;
    }

}
